Merge PDF

Combine multiple PDF files into a single document online. Preview every page, drag and drop to reorder, remove unwanted pages, then merge. Works entirely in your browser with no file uploads.

Drop PDF files here or click to browse

Supports any PDF file

Word to PDF

Convert DOCX and TXT files to PDF online.

Split PDF

Split a PDF into smaller files by page ranges.

Image to PDF

Convert JPG, PNG, WebP, and GIF images into a PDF document.

PDF to Image

Extract PDF pages as PNG or JPEG images.

Compress PDF

Reduce PDF file size while maintaining quality.

Add Page Numbers

Add sequential page numbers to any PDF.

Add Watermark

Stamp text or image watermark on PDF.

Remove Pages

Delete unwanted pages from PDF.

How to Merge PDFs — Step by Step

Click the button above or drag and drop your PDF files into the upload area.
The files are listed in the order they will be merged. Drag and drop to rearrange the sequence if needed.
Click Merge PDFs and the tool will combine all files into a single PDF document.
Download the merged PDF instantly. No files are stored on any server.

About PDF Merging

A PDF merger combines multiple PDF documents into a single file while preserving the quality and formatting of each original document. This is useful for organizing reports, combining invoices, or creating a single document from several sources.

This tool processes everything directly in your browser using client-side JavaScript. Your PDF files never leave your device. There are no uploads, no server transfers, and no privacy concerns.

The merging process reassembles the page streams from each input PDF in the order you specify. No data is altered, compressed, or downgraded during the process. The output is a faithful combination of all input pages.

Frequently Asked Questions

Is there a file size limit for merging PDFs?

Since processing happens entirely in your browser, the limit depends on your device's available memory. Most modern systems can handle PDFs up to several hundred megabytes. For best performance, keep individual files under 100 MB and total uploads under 500 MB.

Can I rearrange the order of the PDF files?

Yes. After uploading, you can drag and drop the files in the list to reorder them. The merged PDF will combine the pages in the exact sequence you set.

Is my data safe? Do you store my PDF files?

Yes, your data is completely safe. All PDF processing happens in your browser using client-side JavaScript. Your files are never uploaded to any server. We do not store, transmit, or have access to your files.

Can I merge password-protected PDFs?

Password-protected PDFs are not supported. Please remove the password protection from your PDFs first using a PDF unlocker tool, then try merging again.

Will the merged PDF maintain the original quality?

Yes. The merge process does not re-encode or compress the PDF content. Each page is preserved exactly as it was in the original file with no quality loss.

References

PDF — Wikipedia
PDF file format specification — the standard for portable document interchange.
pdf-lib — Create and Modify PDF Documents
PDF merging and page assembly techniques for combining document streams without re-encoding.
File API — MDN
Client-side JavaScript PDF manipulation using browser-native APIs and object reassembly.

Disclaimer

This PDF merging tool is provided for general informational and organizational purposes only. While we strive to maintain the accuracy and integrity of merged documents, results may vary depending on the PDF version and content structure. This tool is not a substitute for professional PDF editing software. Always keep backup copies of your original PDF files. Toolvica makes no warranties regarding the quality of the output or the suitability of merged PDFs for specific use cases.